Trait std::iter::FusedIterator

pub trait FusedIterator: Iterator { }

An iterator that always continues to yield None when exhausted.

Calling next on a fused iterator that has returned None once is guaranteed to return None again. This trait should be implemented by all iterators that behave this way because it allows for some significant optimizations.

Note: In general, you should not use FusedIterator in generic bounds if you need a fused iterator. Instead, you should just call Iterator::fuse on the iterator. If the iterator is already fused, the additional Fuse wrapper will be a no-op with no performance penalty.

Implementors

impl<A> FusedIterator for RangeFrom<A> where     A: Step,

impl<'a, T, P> FusedIterator for RSplitMut<'a, T, P> where     P: FnMut(&T) -> bool,

impl<'a, T, P> FusedIterator for SplitMut<'a, T, P> where     P: FnMut(&T) -> bool,

impl<'a> FusedIterator for EncodeUtf16<'a>

impl<I, P> FusedIterator for TakeWhile<I, P> where     I: FusedIterator,     P: FnMut(&<I as Iterator>::Item) -> bool,

impl FusedIterator for ToLowercase

impl<'a, P> FusedIterator for Matches<'a, P> where     P: Pattern<'a>,

impl<'a, P> FusedIterator for RMatches<'a, P> where     P: Pattern<'a>,     <P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,

impl<I> FusedIterator for Skip<I> where     I: FusedIterator,

impl<I, P> FusedIterator for Filter<I, P> where     I: FusedIterator,     P: FnMut(&<I as Iterator>::Item) -> bool,

impl<I, U> FusedIterator for Flatten<I> where     I: FusedIterator,     U: Iterator,     <I as Iterator>::Item: IntoIterator,     <<I as Iterator>::Item as IntoIterator>::IntoIter == U,     <<I as Iterator>::Item as IntoIterator>::Item == <U as Iterator>::Item,

impl<'a> FusedIterator for SplitAsciiWhitespace<'a>

impl<'a> FusedIterator for Lines<'a>

impl<I> FusedIterator for Rev<I> where     I: FusedIterator + DoubleEndedIterator,

impl<'a> FusedIterator for Chars<'a>

impl<'a> FusedIterator for SplitWhitespace<'a>

impl<'a> FusedIterator for LinesAny<'a>

impl<'a, T, P> FusedIterator for std::slice::RSplitN<'a, T, P> where     P: FnMut(&T) -> bool,

impl<'a, T> FusedIterator for ChunksMut<'a, T>

impl<'a, T> FusedIterator for std::result::IterMut<'a, T>

impl<A> FusedIterator for Repeat<A> where     A: Clone,

impl FusedIterator for ToUppercase

impl<'a, T, P> FusedIterator for std::slice::RSplit<'a, T, P> where     P: FnMut(&T) -> bool,

impl<I, U, F> FusedIterator for FlatMap<I, U, F> where     F: FnMut(<I as Iterator>::Item) -> U,     I: FusedIterator,     U: IntoIterator,

impl<'a, I> FusedIterator for &'a mut I where     I: FusedIterator + ?Sized,

impl<'a, T> FusedIterator for Windows<'a, T>

impl<'a, T> FusedIterator for ExactChunks<'a, T>

impl<I, P> FusedIterator for SkipWhile<I, P> where     I: FusedIterator,     P: FnMut(&<I as Iterator>::Item) -> bool,

impl<'a, P> FusedIterator for MatchIndices<'a, P> where     P: Pattern<'a>,

impl FusedIterator for std::ascii::EscapeDefault

impl<'a, T> FusedIterator for std::result::Iter<'a, T>

impl FusedIterator for EscapeDebug

impl<'a, P> FusedIterator for std::str::SplitN<'a, P> where     P: Pattern<'a>,

impl<'a, P> FusedIterator for SplitTerminator<'a, P> where     P: Pattern<'a>,

impl<'a> FusedIterator for CharIndices<'a>

impl<I> FusedIterator for Enumerate<I> where     I: FusedIterator,

impl<T> FusedIterator for Once<T>

impl<I> FusedIterator for Take<I> where     I: FusedIterator,

impl<'a, T> FusedIterator for std::slice::Iter<'a, T>

impl<I> FusedIterator for Fuse<I> where     I: Iterator,

impl<'a, P> FusedIterator for RMatchIndices<'a, P> where     P: Pattern<'a>,     <P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,

impl<T> FusedIterator for std::result::IntoIter<T>

impl<A> FusedIterator for std::ops::Range<A> where     A: Step,

impl<A, B> FusedIterator for Chain<A, B> where     A: FusedIterator,     B: FusedIterator<Item = <A as Iterator>::Item>,

impl<'a, A> FusedIterator for std::option::Iter<'a, A>

impl<'a, I, T> FusedIterator for Cloned<I> where     I: FusedIterator<Item = &'a T>,     T: 'a + Clone,

impl FusedIterator for std::char::EscapeDefault

impl<'a, A> FusedIterator for std::option::IterMut<'a, A>

impl<'a, P> FusedIterator for std::str::Split<'a, P> where     P: Pattern<'a>,

impl<A> FusedIterator for RangeInclusive<A> where     A: Step,

impl<'a, T> FusedIterator for std::slice::IterMut<'a, T>

impl<'a, P> FusedIterator for RSplitTerminator<'a, P> where     P: Pattern<'a>,     <P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,

impl<A, F> FusedIterator for RepeatWith<F> where     F: FnMut() -> A,

impl<B, I, F> FusedIterator for FilterMap<I, F> where     F: FnMut(<I as Iterator>::Item) -> Option<B>,     I: FusedIterator,

impl<A, B> FusedIterator for Zip<A, B> where     A: FusedIterator,     B: FusedIterator,

impl<'a, T> FusedIterator for Chunks<'a, T>

impl<'a> FusedIterator for Bytes<'a>

impl<'a, T, P> FusedIterator for SplitNMut<'a, T, P> where     P: FnMut(&T) -> bool,

impl<I> FusedIterator for Cycle<I> where     I: Clone + Iterator,

impl<'a, T, P> FusedIterator for std::slice::SplitN<'a, T, P> where     P: FnMut(&T) -> bool,

impl<'a, T, P> FusedIterator for RSplitNMut<'a, T, P> where     P: FnMut(&T) -> bool,

impl<'a, P> FusedIterator for std::str::RSplitN<'a, P> where     P: Pattern<'a>,     <P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,

impl<T> FusedIterator for Empty<T>

impl<A> FusedIterator for std::option::IntoIter<A>

impl<I, F> FusedIterator for Inspect<I, F> where     F: FnMut(&<I as Iterator>::Item),     I: FusedIterator,

impl<'a, T> FusedIterator for ExactChunksMut<'a, T>

impl<I> FusedIterator for Peekable<I> where     I: FusedIterator,

impl<B, I, F> FusedIterator for Map<I, F> where     F: FnMut(<I as Iterator>::Item) -> B,     I: FusedIterator,

impl FusedIterator for EscapeUnicode

impl<'a, P> FusedIterator for std::str::RSplit<'a, P> where     P: Pattern<'a>,     <P as Pattern<'a>>::Searcher: ReverseSearcher<'a>,

impl<'a, T, P> FusedIterator for std::slice::Split<'a, T, P> where     P: FnMut(&T) -> bool,

impl<'a, T> FusedIterator for std::collections::linked_list::Iter<'a, T>

impl<'a, T> FusedIterator for std::collections::btree_set::Range<'a, T>

impl<T> FusedIterator for std::collections::linked_list::IntoIter<T>

impl<'a, K, V> FusedIterator for std::collections::btree_map::Keys<'a, K, V>

impl<'a, T> FusedIterator for std::collections::vec_deque::IterMut<'a, T>

impl<K, V> FusedIterator for std::collections::btree_map::IntoIter<K, V>

impl<T> FusedIterator for std::vec::IntoIter<T>

impl<'a, T> FusedIterator for std::collections::linked_list::IterMut<'a, T>

impl<'a, T> FusedIterator for std::collections::binary_heap::Iter<'a, T>

impl<T> FusedIterator for std::collections::binary_heap::IntoIter<T>

impl<T> FusedIterator for std::collections::btree_set::IntoIter<T>

impl<'a, T> FusedIterator for std::collections::btree_set::Intersection<'a, T> where     T: Ord,

impl<'a> FusedIterator for std::string::Drain<'a>

impl<'a, K, V> FusedIterator for std::collections::btree_map::Range<'a, K, V>

impl<'a, T> FusedIterator for std::collections::btree_set::Difference<'a, T> where     T: Ord,

impl<'a, T> FusedIterator for std::collections::btree_set::Union<'a, T> where     T: Ord,

impl<T> FusedIterator for std::collections::vec_deque::IntoIter<T>

impl<'a, K, V> FusedIterator for RangeMut<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::btree_map::ValuesMut<'a, K, V>

impl<'a, T> FusedIterator for std::vec::Drain<'a, T>

impl<'a, K, V> FusedIterator for std::collections::btree_map::IterMut<'a, K, V>

impl<'a, T> FusedIterator for std::collections::binary_heap::Drain<'a, T> where     T: 'a,

impl<I> FusedIterator for Box<I> where     I: FusedIterator + ?Sized,

impl<'a, K, V> FusedIterator for std::collections::btree_map::Iter<'a, K, V>

impl<'a, T> FusedIterator for std::collections::btree_set::SymmetricDifference<'a, T> where     T: Ord,

impl<'a, T> FusedIterator for std::collections::vec_deque::Iter<'a, T>

impl<'a, T> FusedIterator for std::collections::btree_set::Iter<'a, T>

impl<'a, T> FusedIterator for std::collections::vec_deque::Drain<'a, T> where     T: 'a,

impl<'a, K, V> FusedIterator for std::collections::btree_map::Values<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Iter<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::IterMut<'a, K, V>

impl<K, V> FusedIterator for std::collections::hash_map::IntoIter<K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Keys<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Values<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::ValuesMut<'a, K, V>

impl<'a, K, V> FusedIterator for std::collections::hash_map::Drain<'a, K, V>

impl<'a, K> FusedIterator for std::collections::hash_set::Iter<'a, K>

impl<K> FusedIterator for std::collections::hash_set::IntoIter<K>

impl<'a, K> FusedIterator for std::collections::hash_set::Drain<'a, K>

impl<'a, T, S> FusedIterator for std::collections::hash_set::Intersection<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a, T, S> FusedIterator for std::collections::hash_set::Difference<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a, T, S> FusedIterator for std::collections::hash_set::SymmetricDifference<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a, T, S> FusedIterator for std::collections::hash_set::Union<'a, T, S> where     T: Eq + Hash,     S: BuildHasher,

impl<'a> FusedIterator for std::path::Iter<'a>

impl<'a> FusedIterator for Components<'a>

impl<'a> FusedIterator for Ancestors<'a>